Isolation and Characterization of Stable Iron(I) Sulfide Complexes


  • Funding was provided by the National Institutes of Health (GM-065313). P.L.H. was also supported by a Fulbright Scholar grant.


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The first examples of iron(I) sulfide complexes are presented, in contrast with the +2 and +3 oxidation states that are well-known in synthetic and biological systems. Spectroscopic and computational studies show a high-spin d7 configuration at the metal. Alkali metal cations play a key role in supporting the unusually low oxidation state.